A tribunal heard Isabelle Graham, 28 – a former French teacher at Whitburn Academy, West Lothian in Scotland, has been judged unfit to teach and barred from the profession.

Her claims her drink had been spiked was dismissed as "speculation" by a lawyer for the General Teaching Council for Scotland, the Daily Record reports.

An investigation was launched after senior teaching staff were made aware that “a photograph had been uploaded” on social media, council employee Fraser Thomson said.

The picture was shown to the tribunal in Edinburgh and it appeared to show Mrs Graham in bed and the pupil near the door.

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IN BED: Isabelle Graham pictured appearing to lie in bed allegedly in the Travelodge

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TRYST: Isabelle Graham with her husband Andrew Wilkie, who is in training to enter the clergy

A sixth-form pupil – who was rooming with the boy allegedly involved – returned several times to their room to find Mrs Graham in his bed.

Mrs Graham, who was engaged at the time of the incident, was not present or represented at the hearing.

She denies the charges and claims to have no recollection of events after 10.30pm – having drunk four glasses of wine.

The General Teaching Council for Scotland (GTCS) is investigating Mrs Graham for travelling with the boy and other pupils from an upmarket Edinburghhotel – where the prom took place – to a nearby Travelodge hotel in June 2014.

Mrs Graham is alleged to have spent three hours alone with the teenager – drinking with him, sharing a bed with him and “repeatedly engaging in sexual activity” with him.

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MARRIED: Isabelle Graham with her husband Andrew Wilkie

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Despite there being no evidence of this, after investigating CCTV footage, DS Keith Mailer said: “Throughout the footage there’s no sign that Mrs Graham is under the excessive influence of drugs or alcohol.”

Footage also showed the teacher and student kissing, he said.

“The way she moved and conducted herself suggested someone who was making conscious decisions.”

Mrs Graham claimed she had been the “victim” on the night – reiterating that she had no recollection of the events.

She said that if the photo taken on the night did show her, she was clearly unconscious and therefore it was “posed” without her consent.